Hydrophobic magnetic deep eutectic solvent: Synthesis, properties, and application in DNA separation

Area of Science:

• Biochemistry
• Materials Science
• Analytical Chemistry

Background:

• High-purity nucleic acid isolation is crucial for molecular analysis.
• Existing DNA extraction methods can be complex and time-consuming.
• Development of novel extraction materials is needed for improved efficiency.

Purpose of the Study:

• To design and synthesize novel hydrophobic magnetic deep eutectic solvents (HMDESs) for DNA extraction.
• To characterize the physical and thermal properties of the synthesized HMDESs.
• To evaluate the efficiency and suitability of HMDESs for DNA extraction from complex biological samples.

Main Methods:

• Synthesis and characterization of four HMDESs.
• Density functional theory (DFT) calculations for HMDES conformation and interactions.
• Physical (magnetism, density, viscosity, hydrophobicity) and thermal (melting point, decomposition temperature) property assessment.
• DNA extraction using HMDESs with auxiliary methods (vortex, shaking, ultrasonication).
• Evaluation of extraction efficiency using NanoDrop and suitability for PCR.
• Investigation of HMDES-DNA interactions via FT-IR and DFT.

Main Results:

• Successfully synthesized and characterized four HMDESs with magnetic properties.
• Demonstrated rapid magnetic collection of extracted single-stranded DNA (ssDNA), double-stranded DNA (dsDNA), and DNA sodium salts (stDNA).
• Optimized DNA extraction by investigating factors like HMDES volume, temperature, time, and pH.
• Achieved efficient DNA extraction from complex matrices, including E. coli cell lysate.
• Confirmed the suitability of extracted DNA for downstream Polymerase Chain Reaction (PCR) amplifications.
• Identified hydrophobic and electrostatic interactions as key mechanisms for DNA extraction by HMDESs.

Conclusions:

• Novel HMDESs offer an efficient and rapid method for DNA extraction from complex samples.
• The magnetic properties of HMDESs facilitate easy separation and purification of DNA.
• The extracted DNA is of high purity and suitable for sensitive molecular applications like PCR.
• HMDESs represent a promising alternative for nucleic acid isolation in various biological analyses.